Dental wax and compound annealer



H. A. BONOFF DENTAL wAx AND CoMPoUND ANNEALER Filed May 24,

Oct. 14 1924.

Patented Oct. y14, 1924.

UNITED STATES HARRY A. BONOFF, OF LOS ANGELm, CALIFORNIA.

DENTAL WAX AND COMPOUN'D ANNEALEB.

Application led Kay 24, 1923. Serial No. 641,093.

To all whom 'it may concern:

it known that I, HARRY A. BoNorr, a citizen of the United` States, residing at Los Angeles, in the county of Los Angeles and State of Californiahave invented new and useful Improvements in Dental Wax and Compound Annealers, of which the following is a specification.

This invention relates to surgical apparatus and more particularly to dentai equipment.

In many of the operations performed by dentists they require and use various waxes, waxy substances and plastic compounds which, for best results, should be worked while at given temperatures, according to the nature of the substance, To accomplish the maintaining of these various substances .at the desired temperature, I have devised means in which the substances may be arranged and preferably submerged in liquid which is, by the present invention, maintained automatically at the desired temperature and thus determine the malleability of the waxes and compounds.

An object is to provide a device of extreme simplicity, low cost of construction, and one in which means are provided for automatically controlling the temperature of the liquid, which will ordinarily be water, in which the substances are submerged. Another object is to provide means, manually adjustable, to determine the average temperature of the Water according to the nature of the substance submerged and being utilized.

Other objects and advantages will be made manifest in the following specification of an embodiment of the invention illustrated in the accompanying drawings, wherein- Figure 1 isa vertical section and eleva- 4 tlonal View of a form of th'e apparatus.

Fig. 2 is a section and diagrammatic view illustrating circuits of the apparatus.

The invention is shown as embodied in anl apparatus including an suitably sized container 2, within which there is arranged a heating means, preferably in the form of an electric heating unit 3, which is shown as centrally disposed in an upwardly extending, box-like portion 2, provided in the bottom of the container 2. This latter is shown as having a drain cock 5, whereby to provide for the convenient drainin of the water from the container. Prefera ly,

.which any suitable numberfis of compound C, a wax cone W, and a cylinder of'wax A, in a certain plastic condition which is determined best 4by the temperature of the substance. By my invention, the substances placed in the container 2 are raised to the desired temperature and 70 held there automatically by controlling the energization of the heating element 3 arranged in the container.

The heating element is served with electricity from a suitable source .by a circuit including, for convenience, an extension cord E leading from an socket and being provided with a plug EX, or other fitting, complementary to the socket 10, which may be incorporated in the wiring system of the present invention. From the socket 10 a line v11 leads to the heating element 3, and from this leads a line 12 to a switch device represented as including an armature 13, engaging a contact contact bein connected toa line 16. The. circuit switc armature 13 is normally held against the contact 14 by means of a spring 15, and when so engaged, a circuit is completed from the plug to the heating element 3, thence to the armature 13, contact 14 and by line 16 back to the plug, therefore causing the heating element to Vbe energized, with `the result that the Water or other liquid in the 'receiver 95 2 is heated.

For automaticall breaking the heating circuit, including the element 3, I provide an electro-magnet 20, the pole of which is disposed so as to attract the armature 13 100 when the electro-magnet is energized. Thisv electro-magnetis shown as connected by a line 21 to a resistance 22, connected to both lines from the plug 10, and therefore o'ering -a resistance of the current passing to the electro-magnet. The opposite end of the magnet is connected by a line 23 to a switch arm 24, movable to engage one or another of a plurality of ta 25.

From each tap 25 is l A provided according to the desired regulation and variadentists in 60 14 1n one position; this 35 10 through the line 11, 90

a line 26, of no series,

tion of temperature of water in the container 2. The opposite ends of each of the lines 26 are respectively connected to contact terminals 27, of which a series is provided in suitable spaced position along a thermometer tube T, from the lower end of which is run a line 28 to the resistance The thermometer T is suitably mounted, as clearly shown in Figure 1, so as to be exposed to the temperature of the contents of the container 2 and is, therefore, more or less under the control of the heat generated by the energized heating element 3.

lt will be obvious, therefore, that if the switch 24 is set on the initial tap 25 ofthe and if this initial tap is attached to the lowermost terminal 27 in the thermometer, these terminals extending into the tube chamber, then, as the mercury in the tube rises, it will engage the lovvermost terminal and therefore instantly close the circuit 'including the electro-magnet 20,' with the result that the switch-armature 21 will be drawn from the contact 14; and the heating element circuit will be broken and will remain broken until the water in the container 2, having fallen again in temperature,

permits the mercury in the thermometer to fall and thus break contact with the engaged lowermost terminal 27.

'lo secure higher temperatures of water it is onlynecessary to shift the regulator switch arm 2e to any one of the successive taps 25 and the circuit will therefore be closed when, and only when, the mercury rises in the thermometer 4and engages the terminal 27 of the tap 25 which is engaged by the set regulator switch arm 24. n

It is understood that the thermometer 'il may be mounted in any suitable manner and by any suitable means in or on the container 2, and is here shown as being detachably se cured as-by a set screw 30, so that it may be removed when desired to permit the thorough cleaning and scrubbing of the container, as also may be the heating element 3.

I have therefore provided a very simple, practicable and inexpensive form of dental wax and compound annealer by which may be edectively controlled and maintained the temperature of the various impression taking substances commonl generally in use in dental operations, an 1t will be seen,

further, that l have provided a device 'which is entirely reliable and automatic in. operation after its regulating switch has once been adjusted to the position indicated according' to the desired temperature of the substances; the regulator switch being provided with a coordinate dial 3l, indexed according to the temperature settings of the apparatus.

Further embodiments, modifications and variations may be resorted to within the principle of the invention.

Vihat is claimed is:

l. A device for annealing war, waxy substances and compositions for dental purposes, comprising a liquid container into which the substances and compositions may be submerged, a heating element for said container, and automatically operative means for regulating the heat of a liquid in the container in which the substances and compositions are submerged.

2. A device for annealing wax, waxysubstances and compositions for dental purposes, comprising a liquid container intol which the substances and compositions may be submerged, a heating element for said container, automatically operative means for regulating the heat of a liquid in the container in which the substances and compositions are submerged, and a manually adjustable controller for said means.

3. it device for annealing wax and waxy substances and compositions for dental purposes, comprising a liquid. container having a box extending upwardly from the center of its bottom, an electric heating element in said box, and automatically operative means `for regulating the heating of a liquid in the container in which the articles are submerged.

Ll. A device for annealing wax and waxy substances and compositions for dental purposes, comprising a liquid container having a box extending upwardly from the center of its bottom, an electric heating element in said box, a shelf mounted in the container above the box for supporting the articles and allowing the water to circulate freely through the shelf and around the articles.

lin testimony whereof ll have signed my name to this specification.

HARRY A. BNUFF. 

